JarFileSystem.getInstance().getJarRootForLocalFile() returns null in test
已回答
I have a test for my plugin, based on LightJavaCodeInsightFixtureTestCase.
I set it up using
PsiFile[] psiFiles = myFixture.configureByFiles("module/src/main/java/TestObject.java", "pom.xml");
myFixture.copyFileToProject("ext/libs/1.1.1/jars/content-file-1.1.1.jar");
And later on I search for the Jar file (It's in the library list for the real project, but in the test - it looks like it is not in the library list) like that:
VirtualFile extFolder = FilenameIndex.getVirtualFilesByName(project, "ext", GlobalSearchScope.projectScope(project)).stream().findAny().orElse(null);
VirtualFile fileJarContent = extFolder.findFileByRelativePath("libs/1.1.1/jars/content-file-1.1.1.jar");
VirtualFile jarRootForLocalFile = JarFileSystem.getInstance().getJarRootForLocalFile(fileJarContent);
When plugin runs in the real IDE - jarRootForLocalFile is resolved and I can later use the function:
jarRootForLocalFile.findFileByRelativePath("data/content.xml");
However in the plugin test - it is not resolved and returns null.
How to let JarFileSystem aware of this file and enforce it to resolve the file as JAR file, parsing it's content?
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In light tests, TempFileSystem is used. Something along these lines should make it work:
VF vf = ApplicationManager.getApplication().isUnitTestMode() ?
TempFileSystem.getInstance().findFileByPath(path) : [regular way]
I can find the VirtualFile. It's method .exists() returns true.
But I need to get access to this file as Jar file, with all the content.
The problem is that
returns jarRootForLocalFile==null for the existing virtual file
Please try VfsUtilCore.findRelativeFile("path/file.xml", jarRoot) instead of findFileByRelativePath()
Tried. Still null.
Here is an example project I created : https://github.com/Gorbush/intellij-plugin-jar-read-in-test
What I have noticed is that the problem arise when we trying to resolve the JAR file in the Temp filesystem.
This will work - as it uses full real filesystem path:
But if I try to resolve JAR using the relative VF received from TempFileSystem - it returns null.
vfJarFile = TempFileSystem.getInstance().findFileByPath("///src").findFileByRelativePath(JAR_PATH);JarFileSystem.getInstance().getJarRootForLocalFile(vfJarFile);
Or attempt to resolve the content using the TempFileSystem itself:
I think that issue is here.
We retrieve the path of the file using temp file system. But then - trying to resolve it using JarFileSystem. This will not work - as JarFileSystem is not aware of the TempFileSystem root and virtual files created for the project simulation of the Test.
BTW
knows on how to work with prefixes file:/// , jar:file:/ and knows about .jar! marker, however it's not aware of the temp:// filesystem.
Unfortunately it will not work in TempFS. Please try changing your test to "heavy" test to use real filesystem.